import router from './router';
import store from './store';
import { Message } from 'element-ui';
import NProgress from 'nprogress'; // NProgress.js是轻量级的进度条组件
import 'nprogress/nprogress.css';// progress bar style
import { getToken } from './utils/auth'; // getToken from cookie

NProgress.configure({ showSpinner: false });//想禁用进度环？设置 showSpinner 为 false。

// permissiom judge function
function hasPermission(roles, permissionRoles) {
  if (roles.indexOf('admin') >= 0) return true; // admin permission passed directly
  if (!permissionRoles) return true;
  return roles.some(role => permissionRoles.indexOf(role) >= 0);
}

const whiteList = ['/login'];// 免登录白名单

router.beforeEach((to, from, next) => {
  NProgress.start(); // start 进度条
  if (getToken()) { // 判断cookie是否有token
    /* has token*/
    if (to.path === '/login') {
      next({ path: '/' });
      NProgress.done();
    } else {
      if (store.getters.roles.length === 0) { // 判断当前用户是否已拉取完user_info信息
        store.dispatch('GetUserInfo').then(res => { // 拉取user_info
          const roles = res.data.data.roles // note: roles must be a array! such as: ['editor','develop']
          store.dispatch('GenerateRoutes', { roles }).then(() => { // 根据roles权限生成可访问的路由表
            router.addRoutes(store.getters.addRouters) // 动态添加可访问路由表
            next({ ...to, replace: true }) // hack方法 确保addRoutes已完成 ,set the replace: true so the navigation will not leave a history record
          })
        }).catch(() => {
          store.dispatch('FedLogOut').then(() => {
            Message.error('验证失败，请输入正确的用户名和密码');
            next({ path: '/login' })
          })
        })
      } else {
        // 没有动态改变权限的需求可直接next() 删除下方权限判断 ↓
        if (hasPermission(store.getters.roles, to.meta.roles)) {
          next()//
        } else {
          next({ path: '/401', replace: true, query: { noGoBack: true }})
        }
        // 可删 ↑
      }
    }
  } else {
    /* has no token*/
    if (whiteList.indexOf(to.path) !== -1) { // 在免登录白名单，直接进入
      next()
    } else {
      next('/login') // 否则全部重定向到登录页
      NProgress.done() // if current page is login will not trigger afterEach hook, so manually handle it
    }
  }
})

router.afterEach(() => {
  NProgress.done() // finish progress bar
})
